What is the molecular formula of a compound that has a molecular weight of 240.0 grams?. A 5.00-gram sample contains 2.00 grams of carbon, 0.34 grams of hydrogen, and 2.69 grams of oxygen.

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l

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